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SiBE28-804
Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A)
291
1.3
Service Tools
R-410A is used under higher working pressure, compared to previous refrigerants
(R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to
Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other
problems. Therefore, gauge manifolds and charge hoses that are used with a previous
refrigerant (R-22,R-407C) can not be used for products that use new refrigerants.
Be sure to use dedicated tools and devices.
Tool compatibility
As for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size of
charge hose.
Copper tube material and thickness
* O: Soft (Annealed)
H: Hard (Drawn)
Tool
Compatibility
Reasons for change
HFC
HCFC
R-410A
R-407C
R-22
Gauge manifold
Charge hose
✕
2
Do not use the same tools for R-22
and R-410A.
2
Thread specification differs for
R-410A and R-407C.
Charging cylinder
✕
2
Weighting instrument used for HFCs.
Gas detector
✕
2
The same tool can be used for HFCs.
Vacuum pump
(pump with reverse flow
preventive function)
2
To use existing pump for HFCs,
vacuum pump adaptor must be
installed.
Weighting instrument
Charge mouthpiece
✕
2
Seal material is different between
R
-
22 and HFCs.
2
Thread specification is different
between R-410A and others.
Flaring tool (Clutch type)
2
For R-410A, flare gauge is necessary.
Torque wrench
2
Torque-up for 1/2 and 5/8
Pipe cutter
Pipe expander
Pipe bender
Pipe assembling oil
✕
2
Due to refrigerating machine oil
change. (No Suniso oil can be used.)
Refrigerant recovery
device
Check your recovery device.
Refrigerant piping
See the chart below.
2
Only
φ
19.1 is changed to 1/2H material
while the previous material is "O".
Pipe size
φ
6.4
φ
9.5
φ
12.7
φ
15.9
φ
19.1
R-407C
Material
O
O
O
O
O
R-410A
Material
O
O
O
O
1/2H
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...